Question

q9 find x
please answer​

Answer 1

in given figure

angle D + angle B = 180°

(sum of either pair of opposite angles of cyclic quadrilateral is always 180°)

140°+B=180°

B=180-140

B=40°

now since AOB is diameter , angle ACB is subtended in a semi circle n thus it will be 90°

now in triangle ACB, by angle sum property

Angle A + Angle B + Angle C = 180°

x+40°+90°=180°

x=180-40-90

x=50°